Crystal Kay Live in NHK Hall: 10th Anniversary Tour CK10 is the first live and third overall DVD released by Crystal Kay, and her first item to be released in Blu-ray Disc format. The video contains footage from the finale of Crystal Kay's 10th Anniversary Tour CK10, which was held at NHK Hall on December 2nd, 2009. It was also released on the same day as her second mini-album FLASH. The DVD reached #122 on the Oricon weekly charts, where it charted for a week.